Oil-burner



G. H. MAHAN. OIL BURNER.

APPLICATION EILED FEB. 16, 1920.

Patented Sept; 27, 1921.

2 SHEETS-SHEETI A770 EY G. H. MAHAN.

' OIL BURNER- APPLICATION FILED FEB- 16. 1920.

1,392,187, I PatentedSept. 27, 1921.

2 SHEETS-SHEET 2- INVENTOR By aaryez/Z/Va/mn.

UNITED STATES GEORGE E. MAHAN, OF KANSAS CITY, MISSOURI.

OIL-BURNER.

Specification of Letters Patent. Patented Sept, 27, 1921.

Application filed. February 16, 1920. Serial No. 359,065.

To all whom/it may concern:

Be it known that I, GEORGE H. MAHAN, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Oil-Burners;

and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it 'appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to oil burners and particularly to a system of distribution from the source of supply to the source of consumption, as well as to means for controlling the supply flow under varying conditions.

According tothe embodiment of the invention used for the purpose of illustration I have shown a burner normally supplied from a gas main or pipe, the flame from which" is adapted to ignite the oil supply from a separate main or pipe so that in the event that the gas supply is insufficient to raise the temperature of the atmosphere to the desired degree, oil may be admitted and burned to augment the heat generated from the gas main and I have provided means whereby the introduction of the oil into the burner may be automatically responsive to variations in the temperature of the atmosphere.

I have also provided means whereby an excessive amount of oil introduced into the burner will be instrumental in cutting oil the supply of oil so that flooding of the burner and an overflow therefrom will be avoided.

In the drawings,

Figure I is a perspective view of a system contemplatedby my invention and installed in connection with a furnace, the furnace wall being broken away to show the interior construction thereof.

Fig. II is a detail view of the cut-off valve for the oil pipe and the means for controlling the actuation of the valve in the normal position. of the same, and

Fig. III is a detail view of the cut-off valve for the oil pipe shown in Fig. II.

Referring now to the drawings by numerals of reference:

1 designates a pipe which leads to a suitable s urce o g s s pp y ot sh wn), and

discharges into the hollow base 2 of an oil and gas burner, the particular construction of which is immaterial but may be generically described as consisting of the panshaped base 2, having vertical air openings 3 and 4: communicating with a conduit 5 provided with a central, downwardly directed discharge 6 whereby sufficient oxygen may comingle with the gas or oil to promote combustion.

7 is a pipe, leading from a suitable source of oil supply and provided with a valve 8, having a lever handle 9, at the respective ends of which are flexible connections 10 and 11 adapted to be actuated by suitable mechanism in a thermostat 12 of approved construction, controlled from a thermometer 13 in a manner well understood familiar with such devices.

Obviously, when the temperature affects the active element in the thermometer 13 in one direction, the valve 8 will be opened and when the active element is affected in an op posite direction, the valve 8 will be closed, the device 12 being arranged so that a drop in temperature will open valve 8 and a rise in temperature will close it. It will, there fore, be apparent that the gas flame which is normally lighted will supply suflicient heat to the furnace unless the temperature drops below a determined degree. Then by those the thermostat mechanism 12 becomes active to open the oil valve 8 and supply oil to the burner base 2 through the pipe 7 It may be, however, that the thermostat will open the valve too wide; in which event an excess amount of oil would be introduced into the pan or base 2, and unless some means is provided for cutting off the supply or taking care o-fthe surplus oil, the bottom of the furnace would become flooded, with disastrous results. In order to eliminate the probability of over fiowing of the burner, I have provided a discharge pipe or conduit 14, leading from the pan or base 2 and provided with a discharge end or nozzle 15 adapted to discharge into a bucket or receptacle 16, hung upon a lever 17 by a bail 18.

The lever 17 is shown as pivoted at 19 to the rigid outstanding arm 20 on the valve shell 21 so that it may swing with the bucket and permit the valve in pipe 7 to unseat the valve on stem 23. The valve on stem 23 is normally open but it is adapted to seat under the influ e of the pring, one en of which bears against the valve shell or casing 21 and the other end of which bears a ainst the collar 25 rigidupon said stem. Tie arm 26 is rigid on the stem and it is connected to the downwardly curved extension 27 of lever 17 by a link 28, the lower end of which is outwardly curved as at 29 and connected to the extension 27 by a pivot 30, the connection of the upper end of the link 28 with the arm 26 being provided by the pivot 31; There is a set screw 32 in the extension 27 of the lever 17 to limit the up ward swing of the arm 17, the end of the set screw 32 being adapted to abut against thelink'28 as shown in Fig. II.

"When the parts are assembled as'illustrated in Figs. I, II and III, the valve in casing 21 will be Opened, affording free passage of oil through the pipe-'7. If, however, during the time that the valve on stem 23 is open, an excess of oil accumulates in the base 2, the oil will overflow and pass from the pipe 14 into the bucket 16. When thereiis a determined accumulation of oil in the bucket, the spring will be free to cause the seating of the valve; By reference to spring will not be sufiicient to swing the pivot 30' to the right of pivot 19. WVhen the bucketbecornes supplied with a determined quantity of fluid, however, its weight will'be'suflicient tomove the arm 17 on pivot 19 so that pivot 30 will be thrown toithe right of'the center of the pivot 19 carrying with it the link 28, which may rock on pivot 31. Assoon-as this isaccomplished, the expans'ive force of the spring'24: may become effective in seating the valve.

Itwill be apparent from the foregoing that the zone to be heated may be maintained' atpractically a constant temperature because when the tem erature drops, the valve 8 in the pipe 7 W111 open to admit oil and when the temperature rises, the supply will be reduced or ultimately cut off.

Of course, with a system such-as described here, the valve 8 would open after the gas flame from the pipe 1 was extinguished or even when it was not desired to have a fire in the furnace, but no ill effects would result because just as soon as the oil overfiowed into bucket 16, the valve 21 would close to cut off further communication through said pipe so while valve 8 would be open, the safety cut-oil valve would be closed and thereby obstruct the flow of the oil.

\Vhat I claim and desire to secure by Letters-Patent is:

1. A valve casing having a valve stem projecting therethrough, a lateral arm on said casing, a lever having a curved extension at one end and a weight at the other, means for pivoting the curved extension intermediate its ends to the arm, an arm on the valve stem, a link, one end of which is pivoted to the second mentioned arm and the other end of which is pivoted to the curved extension of the lever at one side of the pivotal connection between the lever and the first named arm, and means normally urging the valve to open position.

an valve casing having a valve stem projecting therethrough, a lateral arm on said casing, a lever pivoted to the lateral arm and having a curved extension project ing to one side of the pivot, a link connection between the wilve stem and the end of the'curved extension, a spring for normally urging the valve to open position, and an adjustable screw carried by the entension and having one end projecting against the link.

8. A valve casing having a valve stem projecting therethrough, parallel arms, one on the valve using and one on the valve stem, the arm on the casing projecting beyond the arm on the valve stem, a lever pivoted intermediate its ends to the arm on thecasing and having a curved extension projecting out "ardly from the end of the arm on the casing, a link connected to the arm on the valve stem and having a curved end connected to the end of the curved extension on the lever, a bucket connected on the free end of the lever, and a spring normally urging the valve stem in one direction.

In testimony whereof I afiix my signature.

GEORGE H. MAl-IAN. 

